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Presentation Slides A CLEAN ENERGY FUTURE FOR AUSTRALIA A Study by Energy Strategies for the Clean Energy Future Group Consisting of: Australasian Energy Performance Contracting Association Australian Business Council for Sustainable Energy Australian Gas Association Australian Wind Energy Association Bioenergy Australia Sustainable Energy Development Authority of NSW Renewable Energy Generators of Australia WWF Australia Authors: Dr Hugh Saddler, Dr Mark Diesendorf, Richard Denniss Study Focus • Reduce stationary energy emissions to 50% of 2001 level by 2040. • Use existing technologies with marginal improvement • Continuing economic growth Fore-casting and back-casting Fore-casting: Respect and understand economic drivers of energy demand growth. Back-casting: Choose workable 2040 energy supply system to match projected demand, then work out how to get from present (2001 data) to 2040. This method tells us what the future economy, energy use and emissions could be like. Authors and Roles • Dr Hugh Saddler, Energy Strategies Pty Ltd, - on future energy demand with and without efficiency • Dr Mark Diesendorf, Sustainability Centre Pty Ltd, - on future energy supply • Richard Denniss, The Australia Institute, - on present and future economic structure of Australia GDP AND SECTORAL VALUE-ADDED GROWTH RATIOS, 2001 TO 2040 Category Output ratio *Intergenerational GDP 2.40* Report Domestic energy supply industries N/A** ** Endogenously Coal mining for export 1.55 determined LNG production for export 2.62 Mining (non-energy) 2.20 Iron & steel 1.42 Food, beverages, tobacco 2.30 Sugar industry 1.21 Basic chemicals 1.42 Cement, lime, plaster & concrete 2.20 All other non-metallic mineral products 2.30 MEDIUM ENERGY EFFICIENCY Technological Options Residential: Solar efficient design, solar hot water, insulation, space heating & cooling, lighting, taps & showers Commercial: Design, heating & cooling, ‘sleep’ modes, refrigeration, lighting Industrial: Cogeneration, electric motors, boilers, kilns, heat pumps, design of systems, industrial processes Final energy demand by major sector in 2001, compared with 2040 Baseline and 2040 Medium Efficiency (PJ) 1200 1000 800 600 ) 400 200 0 Energy intensive Non-energy intensive Mining, Agriculture, Commercial/Services Residential industry industry construction Major Sector 2001 2040 Baseline 2040 Medium efficiency With medium energy efficiency the increase in energy demand was reduced from 57% (Baseline/low efficiency) to 25% (Medium Efficiency) FUEL SUBSTITUTION & EFFICIENT GENERATION • Electricity supply shifted from mainly coal to natural gas plus renewables • Widespread cogeneration (combined heat & power) • Solar thermal preheating in industrial & commercial sectors • Substitution of natural gas for coal in most non- metallurgical applications Emissions from stationary energy in Australia 350 Energy Efficiency 300 Baseline (low efficiency) 250 Baseline 200 with 50% reduction Renew able and gas medium in CO emissions fired generation 150 2 efficiency Mt/a CO2 equiv. Mt/a CO2 Clean 100 Energy Future 50 0 1990 1994 1998 2002 2006 2010 2014 2018 2022 2026 2030 2034 2038 The time path is a notional one, based on the assumption that policy recommendations are adopted Electricity demand (TWh) and fuel mix with resulting CO2 emissions (Mt) in 2001, and in the 2040 Baseline and Clean Energy Future Scenario 400 Reduced demand due to medium energy efficiency 350 Photovoltaic 310 million tonnes of 300 CO 2 Hydro 262 million Photo voltaic 5% 250 tonnes of CO2 Hydro7% Cogeneration Cogeneration 15% 200 131 million Wind Wind 20% tonnes of 150 CO 2 Biomass Terawatt-hour(TWh) 100 Biomass 26% Natural gas 50 Natural gas 17% Petroleum 1% Petroleum 0 Coal 9% 2001 2040 - 2040 - Clean Coal Baseline Energy Scenario 1 Scenario 2 BIOMASS RESIDUES Biomass supplies 26% (65 TWh) electricity plus process heat in 2040 Scenario 2 • Residues & wastes cheapest & fastest, but resource limited. • Fuels include stubble from grain crops, bagasse, plantation forest residues, firewood, black liquor. • Rural job creation • Electricity cost 5-6 c/kWh Burning sawmill & sugar cane residues Rocky Point, Qld WHEAT STUBBLE • Kelleher (1997) estimated harvestable stubble residues from Australian grain crops 3.4 green t/ha over 20 M ha. • Leaving 1.4 t/ha on land and combusting 2 t/ha @ 35% thermal efficiency generates 39 TWh/year. BAGASSE & ‘TRASH’ FROM SUGAR CANE • Dixon & Bullock (2003) find potential from sugar mills of 1.7 GWe and 9.8 TWh • Allowing for increased conversion efficiency yields 15 TWh/yr in 2040 PLANTATION FORESTRY • Assumed 10 TWh/yr in Scenario 2 -- needs separate study. TREE CROPS WITH MULTIPLE USES: e.g. OIL MALLEE • Needed if sugar industry disappears, or greater emission reductions sought • 3 products: electricity + activated charcoal + eucalyptus oil • Reduces waterlogging, dryland salinity & erosion • Creates rural jobs • Improves landscape • Electricity cost ~9.5 c/kWh (Enecon, 2002) minus value of other products & land improvement • Land use for 18 TWh/yr electricity, assuming 10 dry t/ha/yr, is 0.81 Mha (half land currently under plantation). SPECIFIC POLICIES PROPOSED FOR BIOENERGY • Change MRET regulation to encourage dedicated tree crops for bioenergy on land cleared before 1990. • Pay farmers grants for planting trees to limit dryland salinity, erosion, etc. • Introduce bioenergy crop establishment grants. • Fund national bioenergy roadmap. • Fund bioenergy showcase program to demonstrate full-scale integrated energy crops/energy conversion process. • Encourage shift to highly efficient, low emission, biomass-burning stoves & heaters, especially in urban areas. Start by banning open fires & fireplaces in metropolitan areas. CONCLUSION ON BIOENERGY • Substantial potential contribution to electricity & heat: 65 TWh/yr from crop residues and organic wastes alone. Much more if short rotation crops used. • Small area of land required for stationary energy. • Detailed studies of bioenergy potential needed for all climatic regions of Australia, taking into account proximity to population centres and powerlines. • Demonstrate factory producing ‘simultaneously’ electricity, useful heat and liquid fuels. ECONOMIC MODELS • There is no accurate model to integrate macro-economy and energy over a 36 year period. • Great difficulties in handling technology & policy changes, and market barriers & failures. • Large uncertainties, notably in future fossil fuel prices and international greenhouse gas agreements. • Difficulties of quantifying economic benefits of various technologies: hence cost-benefit analysis questionable. • We offer approx estimates of costs of electricity under various assumptions re fuel prices, demand and fuel mix. AVERAGE COSTS OF SCENARIOS 1 & 2 IN 2040, FOR VARIOUS FOSSIL FUEL PRICES 30 25 20 Scenario 1 15 Scenario 2 ($B) 10 5 Average cost in 2040 2040 cost in Average 0 (10,7) (9.3,7) (5,5) (4,4) Coal- & gas-fired electricity prices (coal, gas) in c/kWh In Case (5,5) we can implement energy efficiency with average cost = 4.4 c/kWh saved, before cost of Scenario 2 reaches that of Scenario 1. SOME KEY GENERAL POLICIES & STRATEGIES 1. In short term expand Mandatory Renewable Energy Target substantially to establish industry capacity. In longer term, phase out MRET & replace with carbon tax or levy or environmental / health pricing of fossil fuels or emissions permits with cap and trading. 2. Disallow new base-load or intermediate-load power stations with emission intensities greater than that of the best available combined-cycle natural gas power station. 3. Give economic value to environmental benefits of clean energy, such as salinity control and land restoration 4. Introduce CO2 targets for operation of each sphere of government and large business, with mandatory strategic plan and reporting. 5. Remove market barriers to efficient energy use and renewable energy 6. Introduce mandatory energy & greenhouse labelling, ratings and performance standards for appliances, equipment and buildings. 7. Fund new powerlines for renewables and natural gas on the same basis as historic funding of powerlines for coal. i.e. spread cost over all electricity consumers. CONCLUSION • 50% emissions reduction target is technically feasible and compatible with continued economic growth. • Target cannot be achieved with business-as-usual demand growth and improvements in coal-burning technologies. • Between now & 2040 we can replace most energy-using equipment with more efficient versions at little or no net cost. • Natural gas, wind power, bioenergy and solar hot water could each make big contribution to energy supply in 2040. • Energy efficiency savings can pay for all or part of additional costs of renewable energy, provided they are packaged together. • Need policies to remove market barriers & build industry..
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